路过的高手，帮忙优化一下SQL语句

[andylyc]

select *
from att_idcard a
where a.in_out='E'
and to_char(input_time,'yyyymmdd')='20080117'
and not exists (
select id_card
from emp_master b
where b.id_card=a.card_id
and b.status in ('P','W')
)

以上脚本执行比较慢，望高手帮助优化一下。

[ORARichard]

这根本就是ORACLE的查询，怎么问到这来了。

[-狙击手-]

列上尽是不要用函数


是否有索引 ？

[昵称被占用了]

select   * 
from   att_idcard   a 
where   a.in_out='E' 
and   input_time>='2008-01-17' 
and   input_time<'2008-01-18' 
and     not   exists   ( 
select   1
from   emp_master   b 
where   b.id_card=a.card_id 
and   b.status   in   ('P','W') 
) 

--or :

select   a.* 
from   att_idcard   a left join emp_master   b
on b.id_card=a.card_id 
and   b.status   in   ('P','W') 
where   b.id_card is null
and a.in_out='E' 
and   input_time>='2008-01-17' 
and   input_time<'2008-01-18'